Incubator-thermometer.



C. ROBERTS. INCUBATOR THERMOMETER. APPLICATION FILED APR.12, 191s Patented Nov. 25,1913. M,

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. To all wit-omit may concern:

citi'zen of the-United States,'-residing at awes me...ama s InTGUBATOB THIiRMoMETEn p Specification of Letters Patent.

' Patented Nov. 25, 1913.

4 a licat n iiled Abril12,1913. Serial No. #60316.

"Be it known thatI CLA A Ronnn'rs, a

Newberry in the county of Luce and State of Michigan, have invented certain new and useful: Improvements in Incubator-Them inometers, of which thefollowing is a specification, reference being had to the accompanying draw ngs.

This invention relates/to thermometers for incubators and has for an object to provide a thermometer that. maybe permanently at tached in operative position upon an incubaw I tor, and

" bator to determine the temperature of the tion of a conventional incubator with por may be withdrawn from thein'cuegg chamber without the danger of any cool air from outside gaining access-to the egg chamber during such' withdrawal.

A further Ob ectof vide a thermometer which will be' housed against the effect of he e'xterior air at all times.

A further object is to provide a thermometer which will be liousedagainst being affected' by the temperature of the walls of the incubator.

A still further object is to provide a thermometer which'will have 'a'stop'thatis adjustably secured to the thermometer and may be set at any desired point on the'thermonieter to limit insertion of the thermometer into the egg chamber.

With the above objects in view the invention consists of certain novel details of construction and combination of parts hereinafter fully described and claimed, it being understood that various modifications may be made in the minor details of construction within the scope of the appended claims.

In the accompanying drawing illustrating this invention: Figure l is a front elevations broken away to show the application of my invention. Fig. 2 is an enlarged longitudinal sectional view through the thermometer applied. Fig. 3 is a longitudinal sectional view on the line..3--3 Fig. 2.' Fig. 4 is a. cross sectional view on the line H Fig. 3.

Referring now to the drawing in which like charactersofreferenceidesignate similar parts 10 designates a conventional incubator of the double walled type;

. In constructing my invention an ordinary thermometer 11 with its scale 12 is inclosed in a glasstube'13the top of which is closed of th invention 15110 proegg chamber.

by: a plug 14 and the bottom of which is closed by a plug "15' which latter anchorsthe thermometer audits scale rigidly in the tube.- The top plug- 14.n1ay be constructed of 'co-rk or othersuitable' material, and the bottom plug 15 may be formed of any suitable plastic material Which hardens after application, although any. preferred material-Inay be employed in constructing these plugs. as long as the -plugs positively prevent access of air into the interior of the tube. Disposed on thetube is a stop in-the nature of an annular ring 16 which may be formed of cork or other yielding material. the ring carrying att-he bottom an abutment flange 17 ,and there beinga splitclamp ring 18 arranged to encircle the stop ring and bind the same uponfthe tube 13 near the top otthe latterr. By loosening the draw bolt 1!) of the clamp ring, the stop ring :Lfimay be moved t o-any desired position longitudinally of the tube and clamped in thi adjusted position by tightening the draw-il icit.-

- In applying the invention. opt. are formed through the double wall of the in c'ubatonin the present instance such openings being shown in the top wall, and an asbestos tube 20 is disposed in the opening and rigidly secured in position in any preferred manner. This asbestos tube is of suiiicient diameter, to snugly receive the glass tube l3'the latter being passed through the asbestos tube ,u'iitil tlie stop ring flange .17 contacts with theoutef, face of the incubator and limits further insertion of the tube 13. 'Under ordinary .conditionsflt may be most desirable to dis'posetliebulb of the thermometer upon or betweenI-theeggs in the egg chamber and it is-obvious'lha't the stop ring 16 may be set at such'alposition on the tube 13 to limit insertion of-the tube 13 beyond a point where the bulb will pass beyond this predetermined position. It is also apparent that the stop ringinay be adjusted atany desired positionon the glass tube to dispose the bulb of the thermometer in any predetermined posit-jet? in the egg chamber.

In operation suppose that the device is in the position shown in Fig. 1 wherein the bulb of the thermometer is at about the same level as-thc tops of-the eggs in the To get a reading of the thermometer without opening the incubator doors, the operator grasps the upper end the tube 13 and withdraws this tube upexterior of the incubator into the limiting the reading of the th "further insertion of theidevice From the above description it will be seen Wardly through' theasbestos tube until ermometer scale is visible. When the reading has been taken,

the operator then forces the glass tube 13' downward until the top flange l7 limits that the thermometer is not exposed to exterior atmospheric Itemperature' While a reading is beingtaken, since the thermometer is housed 1lhe thermomcterfurthermore is pro-' tectct ture in the air space between the double walls in the incubator by the asbestos tube,

incubator, of a passage from the her, a transparent tube slidably fitted in said guide tube, a thermometer inclosed in transparent tube, and a stop adjustably mounted upon said transparent tube and I insertion thereof through said guide tube, as and for the purpose described.

' .the combination with an incubator, of a guide tube forming a passage from the within the airtight glass tube in said guidetube, against the eii'eet-of the low tempera- 4 tube through said guide tube,

While a reading is egg chain-- exterior of the incubator into theegg chain er, -atransparent tube slidably fitted in saidguide tube, a thermometer inclosed in sand tube,'a ring adjustably mounted on said transparent tub e,,. and an abutment flange" .carried-by said ring, as and for the purpose 3, The combination with a receptacle, of a guide, tube forming a passage from the exterior of the receptacle thereof, transparent tube slidably fitted in sand transparent tube, a ring of yielding material adjustably mounted on, said transparent tube to limit the insertion of said and a clamp encircling said ring to bind the same upon the tube, as and for the purpose described.

' 4. The combination With a. receptacle, of a guide tube forming a passage from the exterior of the receptacle into the interior thereof, a transparent tube slidably fitted in said guide tube, a thermometer inclosed in said transparent tube, a yieldable ring adjustably mounted .on said transparent tube, an abutment plate carried by said ring, and a clamping member engageable with said ring to bind the same against the periphery of said vtransparent tube, as and for the purpose described.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses. CLARA ROBERTS. Witnesses:

- J OHN T. TURNBULL, I LIARGUERITE STEPHENS.

into the interior a thermometer inclos ed 

